Safety shipping device for work-tables.



E. W. PHILLIPS.

SAFETY SHIPPING DEVICE FOR WORK TABLES.

APPLICATION FILED 050. I2. I914.

1,205,947. Patented Nov. 21, 1916.

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ELI W. PHILLIPS, OF BOSTON, IVIASSACHUSETTS, A$SIGNOR TO AMERICAN TOOL & MACHINE COMPANY, OF BOSTON, DIASSACHUSETTS, A CORPORATION OF MASSA- GHUSETTS.

SAFETY SHIPPING DEVICE FOR WORK-TABLES.

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Application filed December 12, 1914.

To all whom it may concern Be it known that I, ELI W. PHILLIPS, citizen of the United States, and resident of Boston, county of Suffolk, Massachusetts, have invented certain new and useful Improvements in Safety Shipping Devices for l/Vork-Tables, of which the following is a specification.

This invention relates to safety shipper device for work tables, such as carry a number of small machines, such as sewing machines or the like mounted on a single table and operated from a single driving shaft.

It is the object of the invention to provide a simple, efficient and convenient device enabling any operative at the work table to instantly stop all the machines in case of accident without moving from his position at the table, by providing a connection within convenient reach of all the operatives for releasing a mechanism or device which automatically operates the shipper.

To this end, the invention comprises a belt shipper device combined with means for automatically shifting the belt to the loose pulley and a release mechanism having connections extending along the table which may be operated to unlock or release the shipper bar and allow the automatic actuating means to operate. This and other features of the invention will be more particularly disclosed in the following specification and defined in the claims annexed thereto.

In the drawings: Figure 1 is a side elevation showing a portion of a work table to which all automatic shipper mechanism is applied. Fig. 2 is a detail view in elevation of the belt shipper with its locking or holding means collapsed. Fig. 3 is an end elevation showing part of the course of the releasing rope. Fig. 4: is a plan view of the shipper.

In practice this invention is applied to a work table a adapted to carry any number of small machines such as stitching machines which derive their power from a driving shaft a on which is mounted a shaft pulley a and a loose or idler pulley a adapted to carry a longitudinally shiftable driving belt a On the floor, or otherwise adjacent to the fast and loose pulleys, is mounted a belt shipper comprising a base or platform 6 Specification of Letters Patent.

Patented Nov. 21, 1916.

Serial No. 876,984.

provided with a longitudinal slide rod 5 carrying the forks b to engage and shift the belt. The slide bar or shipper Z) is held in position by guide brackets 72 and at its forward end is provided with a pulley 0 over which passes a belt rope or chain c anchored at one end to a fixed anchorage or block 0 and having its loose or free end reeved through a guide block or pulley c whence it passes upward and around the sheave c, the rope being held taut and under suitable tension by means of a weight 0 carried by the weight rod 0 which connects it with the shipper actuating rope c. The rod 0 is used to permit the application of additional weights, similar to the ordinary weights used on the scale beam of a platform scale.

It will be observed that the function of this weight a acting through the rope or connection a, is to pullthe shipper bar Z2 to the right in order to shift the belt to the loose pulley (0 which, of course, serves to stop the machine. A stop pin 6 in position to engage one of the guide brackets b may be used to limit the sliding movement of the shipper bar.

In order to prevent the shipper bar from being actuated to the non-driving position by the weight 0 I provide a looking or retaining means comprising the toggle levers (Z hingedly connected together and one of them being hinged to the anchor block 0 and the other to the movable shipper memher 7). This toggle joint is provided with a screw eye, or the like, cl through which is passed the safety or releasing rope (P. This releasing rope is carried up to the table, and then, by means of suitable pulleys or sheaves, (Z it is carried along and around the table at any convenient location, preferably near the edge directly below the table top where each operative sitting at his machine may instantly grasp and pull the same. In order to keep the rope taut so that only a slight pull would be required to operate the device, I secure a tension weight (Z to the downwardly extending loop of the rope (F, the pull of this weight being just strong enough to take out the slackness of the release rope without opposing really substantial resistance to the releasing pull by the operative.

With the above described arrangement, means are provided that are instantly accessible to each and every workman for enabling him to instantly release or unlock the shipper bar so that it can be actuated by its automatic actuating mechanism in case of accident. This arrangement, moreover,

does not require that the operative should,

give a sufiiciently long and strong pull to ship the belt, for it will be seen that even a slight pull will release the toggle joint sufiiciently to allow the automatic shipping mechanism to perform the rest of the operation with absolute certainty.

An arm 5 connected pivotally to the left hand end of the shipper bar forms a convenient means for restoring the shipper bar to locked position with the belt on the fast or driving pulley.

IVhat I claim is:

1. The combination with a work table and its power shaft and fast and loose belt pulleys mounted thereon, of a belt shipper member shiftable from driving to idle position, an actuating weight suspended by a cord connected to said shipper for automatically shifting the shipper to idle position,

' means for normally holding the shipper against movement by said weight, a releasing cord connected with said holding means and extending along the length of the table to be within reach of the operators working thereat, and means for maintaining said release cord in taut condition substantially as described.

2. The combination with a work table and its power shaft carrying fast and loose belt pulleys thereon, a belt shipper shiftable from driving to idle position, means for automatically moving the shipper to idle position, a detent device acting normally to hold the shipper against such shifting movement, a release cord carried along said table to be within reach of the operatives thereat, said cord being connected with said detent device to enable any operative to release the detent device, and having its ends anchored to the table, and a tension weight connected with said release cord to keep it taut throughout its length in order to maintain it in position to be quickly grasped by any operative, substantially as described.

3. The combination with a work table and its driving shaft carrying fast and loose belt pulleys, a belt shipper movable from driving to idle position, automatic means normally tending to shift said shipper to idle position, a detent device for holding said shipper normally against shift to idle position, a release rope extending along the table to be within easy reach of each operative thereat, said rope being connected with the detent device and having its ends anchored to the table whereby any pull in a lateral direction acts to release the detent device and means for resetting the shipper to driving position, substantially as described.

In witness whereof, I have subscribed the above specification.

ELI W. PHILLIPS. In the presence of GEO. N. GODDARD, Gnoren A. ROCKWELL.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 0. 

